Blending excellent reporting and strong storytelling, this is a disturbing film truly stranger than fiction

This is a must-see and one of the best documentaries - and films - of this year.

All that we are seeing on the screen is happening with real people, real action sequences in the background, forcing the eye to watch as if we were there.

.Like the great film, it's made with a great deal of visible affection both in front of and behind the camera.